diff --git a/example/lookaheadparser/lookaheadparser.cpp b/example/lookaheadparser/lookaheadparser.cpp
index 7c7f387..f4759c4 100644
--- a/example/lookaheadparser/lookaheadparser.cpp
+++ b/example/lookaheadparser/lookaheadparser.cpp
@@ -269,6 +269,7 @@ int LookaheadParser::PeekType() {
         case kExitingArray:
         case kExitingObject:
         case kError:
+        default:
             return -1;
     }
 }